Bert M. Weckhuysen

Utrecht University

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Florian Meirer

Utrecht University

146

Pieter C. A. Bruijnincx

Utrecht University

145

Robert A. Schoonheydt

KU Leuven

Andrew M. Beale

Research Complex at Harwell

Frank M. F. de Groot

Utrecht University

Donglong Fu

Collaborative Innovation Center of Chemical Science and Engineering Tianjin

Robertus J. M. Klein Gebbink

Utrecht University

Matteo Monai

Utrecht University

Javier Ruiz‐Martínez

King Abdullah University of Science and Technology

Joel E. Schmidt

Chevron (United States)

Cooperative Institutions

Utrecht University

559

Centre National de la Recherche Scientifique

157

KU Leuven

118

Chinese Academy of Sciences

114

Delft University of Technology

108

Eindhoven University of Technology

Robert Bosch (Germany)

Cancer Genomics Centre

Institute of Catalysis and Petrochemistry

Clinical Research Organization

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Intergrowth Structure of Zeolite Crystals as Determined by Optical and Fluorescence Microscopy of the Template‐Removal Process

Angewandte Chemie International Edition (2007)

Łukasz Karwacki Eli Stavitski Marianne H. F. Kox J. Kornatowski Bert M. Weckhuysen

Growing together: The template-removal process in a series of zeolite crystals has been mapped by a combination of in situ optical and fluorescence microscopy. Three-dimensional spatial distribution of light-absorbing and -emitting species allowed visualization of the architecture of zeolite intergrowths.

10.1002/anie.200702012

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Citations (128)

Biotreatment of ammonia- and butanal-containing waste gases

Applied Microbiology and Biotechnology (1994)

Bert M. Weckhuysen L. Vriens H. Verachtert

Biofilter

Wet scrubber

10.1007/bf00170238

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Citations (39)

Intermediates in the Destruction of Chlorinated C₁ Hydrocarbons on La‐Based Materials: Mechanistic Implications

Chemistry - A European Journal (2007)

Alwies W. A. M. van der Heijden Maria Garcia Ramos Bert M. Weckhuysen

Activity experiments using GC analysis of reactor effluent have been combined with in situ IR spectroscopy to elucidate the reaction steps in the destructive adsorption of CHCl3, CH2Cl2, and CH3Cl over LaOCl. The IR results show that during reaction, LaOCl is covered with carbonate, formate, and methoxy groups. The relative amount of each of these surface intermediates depends on the Cl/H ratio of the reactant. The decomposition of the surface species leads to formation of the reaction products, and is influenced by the temperature and the relative amount of Cl present on the surface. The GC results show that the activity for the destructive adsorption of H-containing chlorinated C1 compounds decreases with increasing hydrogen content of the reactant. The acquired insight into the mechanism of destructive adsorption is crucial to the design of new catalyst materials for the efficient conversion of chlorinated hydrocarbons into nonhazardous products or reusable chemicals.

Reaction intermediate

10.1002/chem.200700901

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Citations (19)

The refinery of the future

Nature (2024)

Eelco T. C. Vogt Bert M. Weckhuysen

Refinery

Carbon-neutral fuel

Renewable Fuels

10.1038/s41586-024-07322-2

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Citations (29)

In situ X‐Ray Absorption of Co/Mn/TiO₂ Catalysts for Fischer—Tropsch Synthesis.

ChemInform (2004)

Fernando Morales Frank M. F. de Groot Pieter Glatzel Evgueni Kleimenov Hendrik Bluhm

10.1002/chin.200450014

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Citations (2)

Imaging the effect of a hydrothermal treatment on the pore accessibility and acidity of large ZSM-5 zeolite crystals by selective staining

Catalysis Science & Technology (2012)

Luis R. Aramburo Javier Ruiz‐Martínez Jan P. Hofmann Bert M. Weckhuysen

Confocal fluorescence microscopy has been used in combination with bulky non-reactive dyes (i.e. proflavine, stilbene and nile blue A) and two staining reactions (i.e. fluorescein synthesis and 4-fluorostyrene oligomerisation) to study the effect of steaming on pore accessibility and acidity of large ZSM-5 zeolite crystals. This approach enabled the 3-D visualization of cracks and mesopores connected to the outer zeolite surface as well as mesoporous "cavities" within steamed ZSM-5 zeolite crystals. It has been found that besides the generation of mesoporosity steaming makes the boundaries between the different crystal sub-units accessible for bulky molecules. Additionally, the fluorescein staining reaction reveals prominent formation of structural defects that are connected to the surface of the crystal via the microporous ZSM-5 system and which contain either Brønsted or Lewis acid sites. On the other hand, the 4-fluorostyrene staining reaction shows how mild steaming conditions increase the accessibility towards the Brønsted acid sites, while under severe steaming conditions the Brønsted acidity contained in the internal crystal sub-units is more accessible, although it is preferentially removed close to the surface of the lateral sub-units of ZSM-5 zeolite crystals.

Steaming

Brønsted–Lowry acid–base theory

Crystal (programming language)

ZSM-5

10.1039/c2cy20661g

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Citations (22)

Separation and Purification of Hydrocarbons with Porous Materials

Angewandte Chemie (2021)

Yaqi Wu Bert M. Weckhuysen

Abstract This Minireview focuses on the developments of the adsorptive separation of methane/nitrogen, ethene/ethane, propene/propane mixtures as well as on the separation of C 8 aromatics (i.e. xylene isomers) with a wide variety of materials, including carbonaceous materials, zeolites, metal–organic frameworks, and porous organic frameworks. Some recent important developments for these adsorptive separations are also highlighted. The advantages and disadvantages of each material category are discussed and guidelines for the design of improved materials are proposed. Furthermore, challenges and future developments of each material type and separation processes are discussed.

Propane

Propene

10.1002/ange.202104318

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Citations (9)

Unravelling Channel Structure–Diffusivity Relationships in Zeolite ZSM‐5 at the Single‐Molecule Level

Angewandte Chemie (2021)

Donglong Fu J. J. Erik Maris Katarína Stančiaková Nikolaos Nikolopoulos Onno van der Heijden

Abstract The development of improved zeolite materials for applications in separation and catalysis requires understanding of mass transport. Herein, diffusion of single molecules is tracked in the straight and sinusoidal channels of the industrially relevant ZSM‐5 zeolites using a combination of single‐molecule localization microscopy and uniformly oriented zeolite thin films. Distinct motion behaviors are observed in zeolite channels with the same geometry, suggesting heterogeneous guest–host interactions. Quantification of the diffusion heterogeneities in the sinusoidal and straight channels suggests that the geometry of zeolite channels dictates the mobility and motion behavior of the guest molecules, resulting in diffusion anisotropy. The study of hierarchical zeolites shows that the addition of secondary pore networks primarily enhances the diffusivity of sinusoidal zeolite channels, and thus alleviating the diffusion limitations of microporous zeolites.

ZSM-5

10.1002/ange.202114388

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Citations (7)

Manganese promotion in cobalt-based Fischer-Tropsch catalysis

Studies in surface science and catalysis (2004)

Fernando Morales Cano O.L.J. Gijzeman Frank M. F. de Groot Bert M. Weckhuysen

Fischer–Tropsch process

10.1016/s0167-2991(04)80063-6

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Citations (30)

Surface- and Tip-Enhanced Raman Spectroscopy in Catalysis

The Journal of Physical Chemistry Letters (2016)

Thomas Hartman Caterina S. Wondergem Naresh Kumar Albert van den Berg Bert M. Weckhuysen

Surface- and tip-enhanced Raman spectroscopy (SERS and TERS) techniques exhibit highly localized chemical sensitivity, making them ideal for studying chemical reactions, including processes at catalytic surfaces. Catalyst structures, adsorbates, and reaction intermediates can be observed in low quantities at hot spots where electromagnetic fields are the strongest, providing ample opportunities to elucidate reaction mechanisms. Moreover, under ideal measurement conditions, it can even be used to trigger chemical reactions. However, factors such as substrate instability and insufficient signal enhancement still limit the applicability of SERS and TERS in the field of catalysis. By the use of sophisticated colloidal synthesis methods and advanced techniques, such as shell-isolated nanoparticle-enhanced Raman spectroscopy, these challenges could be overcome.

Surface-Enhanced Raman Spectroscopy

10.1021/acs.jpclett.6b00147

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Citations (165)